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Carbon Dioxide Probe GMP252







The Vaisala CARBOCAP® Carbon Dioxide Probe GMP252 is a new intelligent probe for measuring carbon dioxide. This robust, stand-alone measurement device is designed for use in agriculture, refrigeration, greenhouses and demanding HVAC applications. It is suitable for harsh and humid CO2 measurement environments where stable and accurate ppm-level CO2 measurements are needed. The GMP252 is based on Vaisala's unique, second-generation CARBOCAP® technology that enables exceptional stability. A new type of infrared (IR) light source is used instead of the traditional incandescent light bulb, which extends the lifetime of the GMP252.


♦   Measurement range 0 ... 10 000 ppmCO²
♦   Intelligent, stand-alone probe with analog (V, mA) and digital outputs (RS485 with Vaisala protocol or Modbus)
♦   Can be connected to the Indigo 201 host device
♦   Superior long-term stability with the 2nd-gen proprietary CARBOCAP® technology
♦   Wide operating temperature range -40 ... +60 °C
♦   IP65 classified housing
♦   Full temperature and pressure compensations
♦   Integrated temperature measurement for CO² compensation purposes
♦    Compensations for background gases: O², and humidity
♦   Sensor head heated to prevent condensation
♦   Calibration certificate included
♦   Applications: agriculture, refrigeration, greenhouses and demanding HVAC applications


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The Vaisala Carbon Dioxide Probe GMP252




Internal Temperature Sensor

The GMP252 incorporates an internal temperature sensor for compensation of the CO2 measurement according to ambient temperature. The effects of pressure and background gas can also be compensated for. The measurement range is 0 ... 10 000 ppmCO2 and the sensor can be used for measurements even up to 30 000 ppm CO2 with reduced accuracy. The operating temperature range of the probe is wide and the probe housing is classified as IP65. Condensation is prevented as the internal sensor head is heated. The GMP252 is resistant to dust and most chemicals, such as, H2O2 and alcohol-based cleaning agents.


Ease of Use
The GMP251 is a compact probe that is easy and fast to install in a number of ways. It's easy to plug in and plug out. The surface of the probe is smooth, which makes it easy to clean. The probe provides several outputs for the CO² measurement, analog current and voltage outputs as well as digital RS485 with Modbus protocol. The GMP252 probe can also be connected to the Indigo 201 host device to extend its features, for example, for a display or relays.